00256: seganinj: Sprites leaving on the left side on the screen aren't clipped properly.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
00256	Graphics	Minor	Always	Jan 28, 2008, 00:56	Apr 9, 2009, 16:44

Tester	Frotz	View Status	Public	Platform
Assigned To	aaron	Resolution	Fixed	OS
Status [?]	Resolved			Driver	sega/system1.cpp
Version	0.37b7	Fixed in Version	0.130u3	Build
		Fixed in Git Commit		Github Pull Request #

Summary	00256: seganinj: Sprites leaving on the left side on the screen aren't clipped properly.
Description	Sprites leaving on the left side on the screen aren't clipped properly. This can be seen during attract mode or by shooting to the left.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	seganinj

Attached Files	attract.png (4,243 bytes) Aug 15, 2008, 12:42
Attached Files	shoot left.png (7,897 bytes) Aug 15, 2008, 12:42

No.02066 RansAckeR Tester Aug 15, 2008, 12:43	Seems like a candidate for a possible bug to me.
No.03359 hap Developer Dec 22, 2008, 20:46	video/system1.c It's due to system1_sprite_xoffset = 1; .. what's the use of that? Then there's: x = sprite_base[SPR_X_LO] + ((sprite_base[SPR_X_HI] & 0x01) << 8) + system1_sprite_xoffset; (...) x /= 2; /* the hardware has sub-pixel placement, it seems */ I don't think it's sub-pixel placement, maybe it's priority related, eg. in ufosensi, bit 0 is clear at the intro text (where she obviously should be behind the text), and set at the titlescreen when she's flying over "UFO".

No.02066

RansAckeR

Tester

Aug 15, 2008, 12:43

Seems like a candidate for a possible bug to me.

No.03359

hap

Developer

Dec 22, 2008, 20:46

video/system1.c

It's due to system1_sprite_xoffset = 1; .. what's the use of that?

Then there's:
x = sprite_base[SPR_X_LO] + ((sprite_base[SPR_X_HI] & 0x01) << 8) + system1_sprite_xoffset;
(...)
x /= 2; /* the hardware has sub-pixel placement, it seems */

I don't think it's sub-pixel placement, maybe it's priority related, eg. in ufosensi, bit 0 is clear at the intro text (where she obviously should be behind the text), and set at the titlescreen when she's flying over "UFO".